As the water, sewer, and electric utility provider in Jacksonville, Fla., JEA
retained CDM to develop a calibrated and accurate model of its water
distribution system. CDM first updated JEA’s existing WaterGEMS model with
piping, customer demand data, and accurate elevation data. Calibration was
achieved by conducting hydrant flow tests throughout the distribution system as
well as utilizing SCADA to compare model results to system data.

The calibration was complicated by the absence of elevated storage, few
pumps operating on variable frequency drives, and about 28 water treatment
plants contributing flow into two large pressure zones, making the system
susceptible to demand fluctuations. WaterGEMS adjusted nodal demands and
pipe characteristics in specific areas, and JEA will use the calibrated model to
optimize system operations.

CIDCO of Maharashtra Ltd.

Design Optimization of Kharghar for 24 X 7 Water Supply

Maharashtra, India

CIDCO, a planning and development authority for Navi Mumbai in Maharashtra,India, is upgrading city services to bring water supply and sewerage tomore residents on a 24-by- 7 basis. Previously, water lines were laid for anintermittent supply of eight hours. As each network node is upgraded, thesystem will be optimized for current and future population demand scenarios.

The design team used WaterGEMS and WaterCAD to optimize the water supply
for the Kharghar node based on existing and proposed scenarios. Challenges
included dense urbanization and a rapidly growing population. The project
will increase the reliability of water supply, ensure adequate pressure, reduce
storage requirements in the node, improve operational efficiency, and reduce
maintenance costs and downtime.